What is a "what do you use" thread?

A what do you use thread is a post where somebody asks a group which tool or service they should pick: "what do you all use for scheduling", "what are people using for error tracking now that ours got expensive". It is the most valuable public post a small product can find: the person is choosing, the audience is choosing with them, and the answers become a shortlist that outlives the thread.

How does a what do you use thread work?

Someone posts a question with a constraint attached, usually price, size, or a tool they are leaving. Within minutes a few people name what they use. The early names collect upvotes and become the visible answer, and everything posted later sits below the fold. It ranks in search for the exact question, and AI engines retrieve it when someone asks an assistant the same thing, which is why one good thread can keep raising your share of model. The anatomy of one, reply by reply, is in this post.

Why does the clock matter?

Because the shortlist sets fast and the ranking is social. An answer in the first hour gets read by everyone who arrives later and collects the votes that keep it on top. The same answer posted a day later is invisible, however good it is. This is why a high intent score is worth interrupting your afternoon for. Threads on Reddit tend to set within a few hours.

How should a founder answer one?

Answer the question, not the opportunity. Address the constraint the person named, say what you would use in their position even when it is not yours, and disclose that you built one of the options in the sentence where you name it. One link at most. No follow up. Reddit's self promotion guidance puts it well: be a person in the community who has a product, not a product with an account.

Questions

Should I answer a thread where a competitor is winning?

Yes, if you can add something true that nobody said. Agreeing with the popular answer and then naming the case where yours fits better reads as honest and usually survives. Arguing with the popular answer reads as a vendor defending itself and gets downvoted, which buries your name with it.

Is it against the rules to name my own product?

Not in most communities, as long as you disclose it and you are not only there to post links. Rules vary by subreddit and some ban vendor participation outright. A removed comment and a banned account cost more than the thread was worth.

How do I find these threads before they set?

Search the phrasings people actually use rather than your category name: "what do you use for", "alternatives to", "moving off". Run them per platform and check within the hour. That is the whole job a listening tool does here, and the value is entirely in the speed.